Objectos :: auto :: Annotations framework applied to the AOP programming model in the Java library (Application of Objectos :: Auto :: Annotations Framework in AOP Programming Model for Java Libraries Cure
Objectos :: auto :: Annotations framework applied to the AOP programming model in the Java library
introduction:
AOP (facing surface programming) is a software design paradigm. It is a goal to separate program logic as one -one -to -surface section.The Java class library provides rich functions and tools to support AOP programming models, and objectos :: auto :: Annitations framework is one of them. It provides developers with a simple way to apply AOP ideas to enhance the Java classThe maintenance and scalability of the library.
Overview:
ObjectOS :: Auto :: Annotations framework is an annotated AOP framework that can be used in the AOP programming model in the Java library.The framework is based on the aspect, which allows developers to define the cutting surface by using annotations, thereby decoupled the cross -cut logic and core business logic.ObjectOS :: Auto :: Annotations framework provides a set of annotations to identify the cutting, cut points, notifications, and references, so that developers can easily achieve cut -oriented programming.
application:
The following will introduce the applications of ObjectOS :: Auto :: Annotations in the Java library in the Java library, and the corresponding Java code example.
1. Introduction dependencies:
To use ObjectOS :: Auto :: Annotations framework, you need to introduce the corresponding dependencies in the project.In the Maven project, the following dependencies can be added to the pom.xml file:
<dependency>
<groupId>org.objectos.auto</groupId>
<artifactId>objectos-auto-annotations</artifactId>
<version>1.0.0</version>
</dependency>
2. Define the cut surface:
In the Java library, developers can achieve AOP programming models by defining a cut -off class.When using objectOS :: auto :: Annotations framework, you only need to add the `@aspect` annotation to the cutting type.The following is an example of using ObjectOS :: Auto :: Annotations framework.
import org.objectos.auto.annotations.Aspect;
@Aspect
public class LoggingAspect {
// Define cut points
// Definition notice
}
In the cutting type, we can define cut points and notifications to achieve horizontal cutting logic.The cut point is a specific position in the program. We can select the target code by cutting points.The notification is a movement performed on a specific cut point, which defines the logic of when and how to perform the cut surface.
3. Define cut points:
In ObjectOS :: Auto :: Annotations framework, you can use `@pointcut` to define cut points.Select the target code through the expression matching class and method name.Here are examples of using the annotation of `@pointcut` to define the cut point:
import org.objectos.auto.annotations.Aspect;
import org.objectos.auto.annotations.Pointcut;
@Aspect
public class LoggingAspect {
@Pointcut("execution(* com.example.mylibrary.*.*(..))")
private void libraryMethods() { }
// Definition notice
}
In the above example, the method of `librarymethods` is defined as a cut point, which matches all the methods in the bag in the` com.example.mylibrary` package.
4. Definition notice:
In the ObjectOS :: auto :: Annotations framework, you can use the notification notifications such as `@before`,@asfter`,` `@@Art, etc.The notification can be executed before, after, or around the cut point.The following is an example of the notification of defining definition of `@before`:
import org.objectos.auto.annotations.Aspect;
import org.objectos.auto.annotations.Pointcut;
import org.objectos.auto.annotations.Before;
@Aspect
public class LoggingAspect {
@Pointcut("execution(* com.example.mylibrary.*.*(..))")
private void libraryMethods() { }
@Before("libraryMethods()")
public void logBefore() {
System.out.println("Before executing library method.");
}
}
In the above example, the `LogbeFore` method is defined as a notification of a`@before` type. It executes before calling the matching point method and printed a log information.
Summarize:
ObjectOS :: Auto :: Annotations framework is an annotated AOP framework that can be used in the AOP programming model in the Java library.By using ObjectOS :: Auto :: Annotations framework, developers can easily achieve cut -oriented programming and improve the maintenance and scalability of the Java library.In this article, we introduced the introduction of ObjectOS :: Auto :: Annotations framework, and examples of defining cutting, cutting points, and notifications in the Java class library.By learning and applied to ObjectOS :: Auto :: Annotation's framework, developers can design and organize the code structure of the Java class library more flexibly to improve software quality and maintenance.
